/* ==========================================================================
   MARROW — Landing Page
   Typography-only. Anton + Satoshi. Obsidian / Raw Bone / Vital Marrow / Steel.
   ========================================================================== */

:root {
  --obsidian:    #0A0A0A;
  --raw-bone:    #E8E2D6;
  --vital:       #A50C2A;
  --steel:       #3E424B;
  --bone-dim:    #B8B2A8;
  --hairline:    rgba(232, 226, 214, 0.12);

  --display: "Anton", "Bebas Neue", "Impact", system-ui, sans-serif;
  --body:    "Satoshi", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;

  --max:     72rem;
  --pad-x:   clamp(1.5rem, 5vw, 3rem);
}

*, *::before, *::after { box-sizing: border-box; }

html {
  background: var(--obsidian);
  color: var(--raw-bone);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  margin: 0;
  font-family: var(--body);
  font-weight: 400;
  font-size: clamp(1rem, 0.9rem + 0.4vw, 1.125rem);
  line-height: 1.6;
  letter-spacing: 0.005em;
}

::selection { background: var(--vital); color: var(--raw-bone); }

a { color: inherit; text-decoration: none; }
a:hover { color: var(--raw-bone); }

.visually-hidden {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* ---------- Header ---------- */

.nav {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 1.75rem var(--pad-x);
  border-bottom: 1px solid var(--hairline);
}

.wordmark {
  font-family: var(--display);
  font-size: 1.5rem;
  letter-spacing: 0.18em;
  color: var(--raw-bone);
}

.nav-meta {
  font-size: 0.7rem;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--bone-dim);
}

/* ---------- Layout ---------- */

main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--pad-x);
}

section { padding: clamp(4rem, 10vw, 9rem) 0; }
section + section { border-top: 1px solid var(--hairline); }

/* ---------- Hero ---------- */

.eyebrow {
  font-size: 0.72rem;
  letter-spacing: 0.34em;
  text-transform: uppercase;
  color: var(--vital);
  margin: 0 0 1.5rem;
}

.display {
  font-family: var(--display);
  font-weight: 400;
  font-size: clamp(3rem, 8.5vw, 7.5rem);
  line-height: 0.95;
  letter-spacing: -0.005em;
  text-transform: uppercase;
  color: var(--raw-bone);
  margin: 0 0 2rem;
  max-width: 18ch;
}

.lede {
  font-size: clamp(1.05rem, 0.95rem + 0.5vw, 1.35rem);
  line-height: 1.55;
  color: var(--bone-dim);
  max-width: 36rem;
  margin: 0 0 3.5rem;
}

.lede-em {
  display: block;
  margin-top: 0.4rem;
  color: var(--raw-bone);
  font-weight: 500;
}

/* ---------- CTA / Form ---------- */

.cta {
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
  padding: 2.5rem 0;
  max-width: 36rem;
}

.cta-headline {
  font-family: var(--display);
  font-size: clamp(1.5rem, 1.2rem + 1vw, 2rem);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--raw-bone);
  margin: 0 0 0.4rem;
  line-height: 1.1;
}

.cta-sub {
  font-size: 0.8rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--bone-dim);
  margin: 0 0 1.75rem;
}

.form {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0;
  border: 1px solid var(--raw-bone);
  background: transparent;
}

.form input[type="email"] {
  appearance: none;
  background: transparent;
  border: 0;
  color: var(--raw-bone);
  font-family: var(--body);
  font-size: 1rem;
  letter-spacing: 0.01em;
  padding: 1rem 1.25rem;
  outline: none;
  min-width: 0;
}

.form input[type="email"]::placeholder {
  color: var(--steel);
  font-style: normal;
  letter-spacing: 0.04em;
}

.form input[type="email"]:focus {
  background: rgba(232, 226, 214, 0.04);
}

.form button {
  appearance: none;
  background: var(--raw-bone);
  color: var(--obsidian);
  border: 0;
  font-family: var(--display);
  font-size: 0.92rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  padding: 0 1.75rem;
  cursor: pointer;
  transition: background 120ms ease, color 120ms ease;
}

.form button:hover { background: var(--vital); color: var(--raw-bone); }
.form button:disabled { opacity: 0.55; cursor: progress; }

.form-status {
  grid-column: 1 / -1;
  margin: 0;
  padding: 0.75rem 1.25rem 0;
  font-size: 0.85rem;
  letter-spacing: 0.02em;
  color: var(--bone-dim);
  min-height: 1.5rem;
}

.form-status.is-error { color: var(--vital); }
.form-status.is-success { color: var(--raw-bone); }

@media (max-width: 480px) {
  .form { grid-template-columns: 1fr; }
  .form button { padding: 1rem; }
  .form input[type="email"] { border-bottom: 1px solid var(--hairline); }
}

/* ---------- Section labels ---------- */

.section-label {
  font-size: 0.72rem;
  letter-spacing: 0.34em;
  text-transform: uppercase;
  color: var(--vital);
  font-weight: 500;
  margin: 0 0 2.5rem;
}

/* ---------- Manifesto ---------- */

.manifesto {
  max-width: 44rem;
}

.manifesto p {
  font-size: clamp(1.1rem, 1rem + 0.45vw, 1.4rem);
  line-height: 1.55;
  color: var(--raw-bone);
  margin: 0 0 1.75rem;
}

.manifesto p:last-of-type {
  font-family: var(--display);
  font-size: clamp(1.5rem, 1.2rem + 1.2vw, 2.25rem);
  letter-spacing: 0.02em;
  text-transform: uppercase;
  line-height: 1.15;
  color: var(--raw-bone);
  margin-top: 3rem;
}

.pull {
  font-family: var(--display) !important;
  font-size: clamp(2rem, 1.5rem + 2.5vw, 3.5rem) !important;
  line-height: 1.05 !important;
  letter-spacing: 0.01em !important;
  text-transform: uppercase;
  color: var(--vital) !important;
  margin: 3rem 0 !important;
  max-width: none !important;
}

/* ---------- Cohort spec ---------- */

.cohort { max-width: 44rem; }

.spec {
  list-style: none;
  margin: 0 0 2rem;
  padding: 0;
  border-top: 1px solid var(--hairline);
}

.spec li {
  display: grid;
  grid-template-columns: 12rem 1fr;
  gap: 1.5rem;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--hairline);
  align-items: baseline;
}

.spec span {
  font-size: 0.7rem;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--bone-dim);
}

.spec em {
  font-style: normal;
  font-family: var(--display);
  font-size: clamp(1.1rem, 1rem + 0.5vw, 1.5rem);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--raw-bone);
}

@media (max-width: 600px) {
  .spec li { grid-template-columns: 1fr; gap: 0.4rem; padding: 1.25rem 0; }
}

.cohort-note {
  font-size: 0.85rem;
  color: var(--bone-dim);
  letter-spacing: 0.02em;
  max-width: 32rem;
}

/* ---------- Footer ---------- */

footer {
  border-top: 1px solid var(--hairline);
  margin-top: 4rem;
  padding: 3rem var(--pad-x) 4rem;
  max-width: var(--max);
  margin-left: auto;
  margin-right: auto;
}

.foot-mark {
  font-family: var(--display);
  font-size: 1.1rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--raw-bone);
  margin: 0 0 0.75rem;
}

.foot-meta {
  font-size: 0.85rem;
  color: var(--bone-dim);
  letter-spacing: 0.04em;
  margin: 0 0 1.5rem;
}

.foot-meta a:hover { color: var(--vital); }

.foot-meta .sep { margin: 0 0.6rem; color: var(--steel); }

.foot-fine {
  font-size: 0.72rem;
  line-height: 1.6;
  color: var(--steel);
  letter-spacing: 0.02em;
  max-width: 36rem;
  margin: 0;
}

/* ---------- Reduced motion ---------- */

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}